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ID3 library for Go
License: MIT License
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chrishuntid3-go's Issues
ffmpeg: Skipping 174 bytes of junk at 1107
ffmpeg -i shows that now with a file that has chapters added with this. It doesn't seem to affect players I tested, but it's worth investigating.
Adding two chapters to an mp3 and diffing the output of exiftool -V3 -l:
- + [ID3v2_3 directory, 968 bytes]
+ + [ID3v2_3 directory, 1097 bytes]
0000: 54 53 53 45 00 00 00 30 00 00 00 4c 41 4d 45 20 [TSSE...0...LAME ]
0010: 36 34 62 69 74 73 20 76 65 72 73 69 6f 6e 20 33 [64bits version 3]
0020: 2e 39 39 2e 35 20 28 68 74 74 70 3a 2f 2f 6c 61 [.99.5 (http://la]
@@ -54,10 +35,10 @@
0090: 62 00 61 00 67 00 65 00 20 00 50 00 6f 00 64 00 [b.a.g.e. .P.o.d.]
00a0: 63 00 61 00 73 00 74 00 54 59 45 52 00 00 00 0b [c.a.s.t.TYER....]
00b0: 00 00 01 ff fe 32 00 30 00 31 00 37 00 43 4f 4d [.....2.0.1.7.COM]
- 00c0: 4d 00 00 00 2c 00 00 01 58 58 58 00 00 ff fe 68 [M...,...XXX....h]
- 00d0: 00 74 00 74 00 70 00 3a 00 2f 00 2f 00 67 00 61 [.t.t.p.:././.g.a]
- 00e0: 00 72 00 62 00 61 00 67 00 65 00 2e 00 66 00 6d [.r.b.a.g.e...f.m]
- 00f0: 00 2f 00 54 4c 45 4e 00 00 00 08 00 00 00 33 34 [./.TLEN.......34]
+ 00c0: 4d 00 00 00 2c 00 00 01 58 58 58 ff fe 00 00 ff [M...,...XXX.....]
+ 00d0: fe 68 00 74 00 74 00 70 00 3a 00 2f 00 2f 00 67 [.h.t.t.p.:././.g]
+ 00e0: 00 61 00 72 00 62 00 61 00 67 00 65 00 2e 00 66 [.a.r.b.a.g.e...f]
+ 00f0: 00 6d 00 54 4c 45 4e 00 00 00 08 00 00 00 33 34 [.m.TLEN.......34]
0100: 39 32 33 33 36 41 50 49 43 00 00 02 b9 00 00 00 [92336APIC.......]
0110: 69 6d 61 67 65 2f 70 6e 67 00 00 00 89 50 4e 47 [image/png....PNG]
0120: 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 02 00 [........IHDR....]
@@ -102,7 +83,15 @@
0390: 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [................]
03a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [................]
03b0: 00 76 fb 02 22 2e 98 1e 42 f4 83 a5 00 00 00 00 [.v.."...B.......]
- 03c0: 49 45 4e 44 ae 42 60 82 [IEND.B`.]
+ 03c0: 49 45 4e 44 ae 42 60 82 43 48 41 50 00 00 00 26 [IEND.B`.CHAP...&]
+ 03d0: 00 00 63 68 70 30 00 00 00 00 00 00 00 03 e8 ff [..chp0..........]
+ 03e0: ff ff ff ff ff ff ff 54 49 54 32 00 00 00 06 00 [.......TIT2.....]
+ 03f0: 00 00 68 65 6c 6c 6f 00 43 48 41 50 00 00 00 2c [..hello.CHAP...,]
+ 0400: 00 00 63 68 70 31 00 00 00 03 e8 00 35 49 f0 ff [..chp1......5I..]
+ 0410: ff ff ff ff ff ff ff 54 49 54 32 00 00 00 0c 00 [.......TIT2.....]
+ 0420: 00 00 6a 75 73 74 20 61 20 74 65 73 74 00 43 54 [..just a test.CT]
+ 0430: 4f 43 00 00 00 11 00 00 74 6f 63 00 03 02 63 68 [OC......toc...ch]
+ 0440: 70 30 00 63 68 70 31 00 00 [p0.chp1..]
| EncoderSettings = LAME 64bits version 3.99.5 (http://lame.sf.net)
| - Tag 'TSSE' (48 bytes):
| 0014: 00 4c 41 4d 45 20 36 34 62 69 74 73 20 76 65 72 [.LAME 64bits ver]
@@ -122,11 +111,11 @@
| Year = 2017
| - Tag 'TYER' (11 bytes):
| 00bc: 01 ff fe 32 00 30 00 31 00 37 00 [...2.0.1.7.]
- | Comment-xxx = http://garbage.fm/
+ | Comment-xxx = http://garbage.fm
| - Tag 'COMM' (44 bytes):
- | 00d1: 01 58 58 58 00 00 ff fe 68 00 74 00 74 00 70 00 [.XXX....h.t.t.p.]
- | 00e1: 3a 00 2f 00 2f 00 67 00 61 00 72 00 62 00 61 00 [:././.g.a.r.b.a.]
- | 00f1: 67 00 65 00 2e 00 66 00 6d 00 2f 00 [g.e...f.m./.]
+ | 00d1: 01 58 58 58 ff fe 00 00 ff fe 68 00 74 00 74 00 [.XXX......h.t.t.]
+ | 00e1: 70 00 3a 00 2f 00 2f 00 67 00 61 00 72 00 62 00 [p.:././.g.a.r.b.]
+ | 00f1: 61 00 67 00 65 00 2e 00 66 00 6d 00 [a.g.e...f.m.]
| Length = 3492336
| - Tag 'TLEN' (8 bytes):
| 0107: 00 33 34 39 32 33 33 36 [.3492336]
@@ -141,6 +130,20 @@
| 0149: 00 2a 50 4c 54 45 c1 c1 c1 ff ff ff 33 33 33 99 [.*PLTE......333.]
| 0159: 99 99 92 92 92 a0 a0 a0 39 39 39 71 71 71 a4 a4 [........999qqq..]
| [snip 617 bytes]
+ | ID3_CHAP = chp0..........TIT2.hello
+ | - Tag 'CHAP' (38 bytes):
+ | 03dc: 63 68 70 30 00 00 00 00 00 00 00 03 e8 ff ff ff [chp0............]
+ | 03ec: ff ff ff ff ff 54 49 54 32 00 00 00 06 00 00 00 [.....TIT2.......]
+ | 03fc: 68 65 6c 6c 6f 00 [hello.]
+ | ID3_CHAP = chp1..5I.........TIT2.just a test
+ | - Tag 'CHAP' (44 bytes):
+ | 040c: 63 68 70 31 00 00 00 03 e8 00 35 49 f0 ff ff ff [chp1......5I....]
+ | 041c: ff ff ff ff ff 54 49 54 32 00 00 00 0c 00 00 00 [.....TIT2.......]
+ | 042c: 6a 75 73 74 20 61 20 74 65 73 74 00 [just a test.]
+ | ID3_CTOC = toc..chp0chp1
+ | - Tag 'CTOC' (17 bytes):
+ | 0442: 74 6f 63 00 03 02 63 68 70 30 00 63 68 70 31 00 [toc...chp0.chp1.]
+ | 0452: 00 [.]
ID3v1:
+ [BinaryData directory, 128 bytes]
| Title = Garbage Podcast: Episode 40
ffmpeg -i on the modified file:
[mp3 @ 0x7fb6db000000] Skipping 174 bytes of junk at 1107.
[mp3 @ 0x7fb6db000000] Estimating duration from bitrate, this may be inaccurate
Input #0, mp3, from '/Users/jcs/Desktop/garbage40.mp3':
Metadata:
encoder : LAME 64bits version 3.99.5 (http://lame.sf.net)
title : Garbage Podcast: Episode 40
artist : Garbage Podcast
TLEN : 3492336
comment : http://garbage.fm
date : 2017
Duration: 00:39:32.42, start: 0.000000, bitrate: 92 kb/s
Chapter #0:0: start 0.000000, end 1.000000
Metadata:
title : hello
Chapter #0:1: start 1.000000, end 3492.336000
Metadata:
title : just a test
Stream #0:0: Audio: mp3, 32000 Hz, stereo, s16p, 92 kb/s
Stream #0:1: Video: png, pal8(pc), 512x512 [SAR 2835:2835 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Other
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